公开(公告)号：DE2624285A1

公开(公告)日：1977-12-22

申请号：DE2624285

申请日：1976-05-31

Applicant: BASF AG

Inventor： HORN PETER DIPL CHEM DR ,  KOEHLER WALDEMAR DIPL CHEM DR ,  BITTLER ROLF DIPL CHEM DR

IPC: C07C20060101 ,  C07C263/10 ,  C07C265/12 ,  C07C119/048 ,  C07C118/02

Abstract: A process for the continuous manufacture of organic monoisocyanates, diisocyanates and/or polyisocyanates from the corresponding organic amines and phosgene in the presence of inert organic solvents, with recycling of the reaction mixture, wherein the streams of liquid, consisting of the recycle stream and the amine feed solution, are fed to the reaction mixture at a rate such that an energy dissipation density of from 5 to 1,000 kJoule per m3 of recycled reaction mixture plus amine feed solution is generated in the mixing and reaction zone.

公开(公告)号：DE2452805A1

公开(公告)日：1976-05-20

申请号：DE2452805

申请日：1974-11-07

Applicant: BASF AG

Inventor： HETZEL ECKHARD DIPL ING ,  KOEHLER WALDEMAR DIPL CHEM DR ,  VOCK GEORG FRIEDRICH DIPL ING ,  BITTLER ROLF DIPL CHEM DR

IPC: B01D1/00 ,  C07C20060101 ,  C07C263/10 ,  C07C265/12 ,  C07C119/048

Abstract: A process for the separation of residues of toluenediisocyanate production from mixtures containing high boiling residues, toluenediisocyanate and solvent by evaporation in said residue at a minimum of 5 DEG C above the boiling point of the higher boiling of the components consisting of toluenediisocyanate and solvent. The mixture is fed into the central portion of an evaporator equipped with a helical agitator operative to provide a material flow moving centrally downwards and peripherally upwards.